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Locking Rendertarget...

Started by devronious Jul 29, 2007 at 12:32 PM 4 replies 2.1k views

Original Post

Jul 29, 2007 at 12:32 PM

I have a rendertarget and I want to convert it to a Bitmap. I can't seem to lock the buffer for it. Is there a way around this? What is the best way to approach something like this? Thanks in Advance, Devin

Demirug

Jul 29, 2007 at 12:45 PM

IDirect3DDevice9::GetRenderTargetData is your friend. Use it to copy the render target content to a system memory surface. Then you can do whatever you want.

devronious

Author

devronious

Jul 29, 2007 at 3:12 PM

Cool, that's what I was looking for!

Thanks Much,

-Devin

devronious

Author

devronious

Jul 29, 2007 at 5:51 PM

Oops. I'm getting some sort of Invalid Call Exception was Unhandled exception

[source lang = "c#"]                this.initializer.Device.GetRenderTargetData(this.renderTarget.GetSurfaceLevel(0), tex.GetSurfaceLevel(0));

Any ideas why?

circlesoft

101

circlesoft

Jul 29, 2007 at 7:51 PM

From the docs:

Quote:

The destination surface must be either an off-screen plain surface or a level of a texture (mipmap or cube texture) created with D3DPOOL_SYSTEMMEM.

The source surface must be a regular render target or a level of a render-target texture (mipmap or cube texture) created with POOL_DEFAULT.

This method will fail if:

The render target is multisampled.
The source render target is a different size than the destination surface.
The source render target and destination surface formats do not match.

Check the debug runtime output.

devronious

Author

devronious

Jul 29, 2007 at 8:19 PM

I figured out that I had to set the Pool to SystemMemory. Duh on my part :(

Thanks,

Devin

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